George w



(No Model.)

G. W. N. YOST & G. E. MEBRITT.

TYPE WRITING MACHINE.

Patented Dec. 9, 1890.

@V w MM Uivrrn STATES PATENT ()rrrcn.

GEORGE IV. N. YOST, OF NElV YORK, N. Y., AND CHARLES E. MERRITT, OF

SPRINGFIELD, MASSACHUSETTS, ASSIGNORS TO THE YOST IVRITING MA- CHINECOMPANY, OF NEW YORK, N. Y.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 442,409, dated December9, 1890.

Application filed May 16, 1837. Serial No. 238,364. (No model.)

To all w om i may C ce n: is attached the feed-racks G G 110w com- Be itknown that we, GEORGE XV. YosT, monly in use. A stud H projectsbackwardly of New York city, in the county of New York from the innerrack G and has pivoted to it and State of New York, and CHARLES E. oneend of a connecting-link I, the other end 5 )IERRITT, of Springfield, inthe county of of which is jointed to the upper portion of a Hampden andState of Massachusetts, citizens spring-actuated driving-arm J, all inthe of the United States, have invented certain usual manner.

new and useful Improvements in Type-YVrit- 2 2 represent standards orsupports for the mg Machines, of which the following is a ends of arock-shaft 3, which carries a feed IO specification. pawl or dog 4, thatengages with the teeth on Ourinvention in type-writing machines has theracks G and G and operates to permit a special reference, first, to therock-shaft with movement of the carriage to the left of the which thefeed-dog is connected, and, seemachineonlyoneletter-space at a time. The

ondly, to the release-key by which the feedrock-shaft is preferablycomposed of three 15 dog is disengaged from the carriage to perportionsa, b, and c, the part a being a solid mit a rapid movement of the lattertoward rod, the part Z) a hollow rod or tube, and the y the left of themachine; and our invention, partcaslotted frame orhonsingwith threadedhaving for its main objects to simplify and ends to receive the innerthreaded ends of the cheapen the machine, consists in the featuresportions a and I). From the lower side of the 20 of construction andcombinations of parts housingc depend brackets or lugs 5,in whichhereinafter more fully described, and particuthe feed-dog 4 is pivotedto vibrate in the slot larly pointed out in the claims. 6, and from therear side of the housing ex- In the accompanying drawings, Figure 1. istends an arm 7, to which is coupled the upper a perspective view,looking from the rear, of end of a rod or link 8, whose lower end is 25the upper portion of a type-writing machine connected to the universalbar, which is embodying our several improvements, various not shown. Thelatter maybe f any desired 7 parts usually employed therein, butimmateconstruction and may be arranged as heretorial to our invention,being omitted in order fore or as shown in a separate application not tocomplicate the drawings. Fig. 2 1s a filed by us Collars (Z (Z, securedto the 0 rear elevation of the rock-shaft, the supports rocker-arm,prevent any cndwise movements therefor, the feed-dog, and therelease-key. thereof. Fig. 3 is a vertical longitudinal section takenThe release-key is designated by the numercentrally through the partsillustrated at Fig. al 9, and consists of a rod or shank and a but- 2;and Fig. 4 an enlarged vertical crosston-head screwed upon its outerend. The

5 section taken at the line so a", Fig. 2, with the rod orshank ispassed through and supported feed-racks added. within the hollow part bof the rocker-arm In the several views the same part will be and isprovided with means at its inner end found designated by the same letteror nuto act as a stop to outward movement. lVe meral of reference.preferably form the shank with an enlarge- 0 AA A A are posts or pillarsforming part ment or head 6; but a pin or cross-piece or of theframe-work of the machine and supother device would serve as'well. Atthe opporting the type-circle or top plate B, upon posite end of theslot is arranged a spiral which are mounted the usual type bars orlespring 10, which bears against the face of the vers, purposelyomitted. feed dog. This spring is provided for the 5 0 represents thepaper-platen or imprespurpose of keeping the dog in a verticalposion-cylinder, which is journaled to rotate in sition during theoscillations ofthe rocker the carriage-frame D. A yoke E, secured to armand for the purpose of returning the dog the carriage-frame. extendsrearwardly and and the release-key to their normal positions slides uponthe guide-rails F F. To this yoke after the actuation of the latter; butso far 'from the teetlrot' the outer rack 3r into engagement with theteeth of the inner rack G, at which time the; outer rack, by means of aspring, is shot forward one tooth. At each release of the key-levers therock-shaft tilts in the opposite direction and the dog is vibratedbackwardly and re-engagedwith the teeth of the outer'rack. Duringthismovement of the dog the driving-arm moves the carriage and itsappendages a letter-space or one tooth tc'the left of the machine. Thefeed-racks and the driving mechanlsm herein shown, it will be seen, aresimilar to those now in common use, both in construction and mode ofoperation, and no extended descrip-. tion thereof appears to benecessary in this specification. When the carriage shall have arrived atthe extreme left of the machine, the roller may be turned to obtain anunprinted portion of the paper and the whole moved rapidly back to theright-hand ex, tremity of the machine to recoinmence the operation ofprinting. During this return of thecarriage the teeth of the outer rackslide freely over the dog owing to their inclination and the capabilityof the dog to vibrate within the slot.

The release-key, it will be understood, is used for the purpose ofdisengaging the dog from the racks and permitting the carriage to travelquickly to the left. In order to effect this disengagement in themachine herein shown, it is simply necessary to push inwardly therelease-key, which abuts against the back of the pawl above its fulcrum,and: the latter is vibrated downwardly, as indicated at Fig. 3 by thedotted lines. Just previous to pushing in the release-key, however, thecarriage should be moved slightly to the right to permit the point ofthe dog to clear the tooth with which it is in engagement. When thecarriage shall have been thus driven to the desired position, theoperator may remove the pressure upon the releasekey, whereupon thespring 10 will act to right the dog and re-engage it with the racks andat the same time push the release-key out to its normal position.

By locating the rocker-arm above the typecircle instead of below, asheretofore in machines of this class, we are enabled to use the "entiretype-circle and get a greater number .of type-bars thereupon, besidesavoiding the bending of the two connecting-rods between which therocker-arm passedin the prior construction of machine.

' By arranging the release-key in the manner shown we are enabled todispense with the special supports therefor as formerly and improve theappearance of the machine, and

by the employment of the spring 10 to keep the pawl upright and returnit and the release-key the pawl may be made much smaller and lighterthan in the former machines.

What we claim as new, and desire to secure by Letters Patent, is V 1. Inatype-Writing-machine, the combination, with the carriage and thefeed-racks, of a rock-shaft having a slotted housing, a dog pivoted tovibrate Within the slot of said housing, and a spring for keeping saiddog in a vertical position, as set forth.

2. In a type-writing machine, the combination, with the carriage and thefeed-racks, of a rock-shaft composed of the threaded rods a and b andthe intermediate slotted housing having threaded ends, the dog pivotedto vibrate within the slot of said housing, and the spring adapted tokeep said dog in a vertical position, as set forth.

3. Ina type-writingmachine, the combination, with the carriage and thefeed-racks, of the roek-shaft having a hollow or tubular portion, thefeed-dog mounted upon said shaft, and the release-key supported andcontained within said hollow or tubular portion ofthe rocker-arm,substantially as set forth.

at. In a type-writing machine, the combination, withthe carriage andthefeed-racks, of v the rock-shaft having a hollow or tubular portion,the feed-dog, the release-key, and the spring, substantially asset't'orth.

5. In a type-writing machine, the combination, with the carriage and thefeed-racks, of

a housing capable of an oscillatory motion onlyand provided with. alongitudinal slot, a dog pivoted to said housingand within the slotthereof, and a spring to keep said dog normally in a vertical position,as set forth.

7 6. In a type-writing machine, the combination, with a carriage havingfeed racks, of a longitudinaIly-slottedhousing mounted above thetype-ring and capable of an oscillatory motion only, a dog pivoted tosaid housing and within said slot, and a release-key engaging with saiddog to vibrate the same in said slot, as set forth.

Signed at Springfield, in the county of Hampden and State ofMassachusetts, this 14th day Of April, A. D. 1887.

G. V. N. YOS'D.

Witnesses:

EDWIN F. LYFORD,

O, J. CHANDLER.

C. E. MERRITT.

